Concepts in photography

1. What is color?

Color is used to describe the difference between color and color.

2. What is brightness?

Brightness is also known as brightness, the depth of the color, it can be said that its brightness.

3. Meanings of tones

A color tone refers to the brightness of a certain range in a photo (also known as the brightness value ).

4. What is the color saturation?

The color saturation is the visible degree of the color tone, also known as the color purity. The color is pure and clear. The more color-removing components a color contains, the more unsaturated the color. The higher the proportion of the color-containing components, the more saturated the color. Therefore, the more pure the color, the greater the saturation, and the most saturated color is known as the spectral color.

5. What is color harmony?

Color Harmony refers to the combination of colors to give people a feeling that the relationship between colors is a feature. Color harmony can be divided into four types:

A. the harmony of contrast colors-the relationship between complementary colors. For example, if red and green are properly configured, a harmonious effect can be received.

B. the adjacent colors are harmonious, such as yellow and orange, green and blue.

C. Harmony of similar colors, such as yellow and orange, blue and green.

D. The harmony between colors and light is the same as that of other colors. The colors are black, white, and gray. The glossy colors include gold and silver.

6. What is color contrast?

Color contrast refers to the difference in color, brightness, and saturation in the Process of color reproduction. So it is divided into: color contrast (also called color contrast), brightness contrast, saturation contrast.

7. What are primary colors, median colors, and secondary colors?

From the light source of photography, red, green, and blue are the "three primary colors", which are different from the "three primary colors" of painting, red, yellow, and blue. The former refers to the color light and the latter refers to the pigment.

Any color in the middle of two relative color relationships is collectively referred to as the middle color. In colorology, the median has the following meanings:

A. Compound colors. Any color produced by a mixture of two monochrome colors is called median.

B. Color Level 2. For example, Earth red is cooler than red but warmer than Rose Red. Tuhong is the middle of the Red and rose colors.

C. for complementary colors. In the color ring, except for complementary and adjacent colors, other colors are median colors. For example, the red complementary colors are blue, and the adjacent colors are orange and purple. In addition, such as yellow, green, blue, and purple are their median colors.

D. In terms of fading. For example, gray is the middle color of both black and white.

The compound colors can be obtained by mixing the two median colors.

8. What is complementary colors?

The so-called complementary colors usually refer to three colors: yellow, product, and green. The complementary colors are from the white light minus a primary color. On the other hand, a certain color in the middle of them is added together with a certain color of the three primary colors (that is, a mixture of two colors and light) to produce white light, which is called complementary colors for each other.

9. What is cool and warm?

Color learning the color trend in red, orange, yellow color called warm color, the trend in blue, purple, green color called cold color.

10. What is the color temperature?

Color temperature is a physical quantity that represents the color and light components of the light source. It is also called "light color temperature ".

11. How to correct the color temperature

Adjust the color temperature of the light source using a color temperature correction filter. The filters used for color photography are called "color temperature compensation filters" or "color temperature conversion filters ".

There are two kinds of color temperature correction filters: one is a blue mirror that can increase the color temperature, and the other is an amber mirror that can make the color temperature drop.

In the time of color photography, if you use a light color film in the daylight, you must use the Rayden 85 filter to improve the color temperature of the light source, and use the daylight color film under the light, we need to use the Reden 80 filter to improve the color temperature of the light source. In this way, the color temperature of the light source can be balanced with the color temperature of the film.

Although the color temperature correction filter has the function of changing the color temperature, if there is a mixture of two or more light sources, no matter which filter does not help. Therefore, when conditions permit, in shooting, in addition to the intention to pursue a special effect, should try to select the color temperature agreed light source. Otherwise, the film is either partial red or partial blue, or two severe partial colors appear on the same film.

In addition, there is another situation. In rainy days, when you use a color film to Take a rain scene, because the temperature is too high in rainy days, after the film is shot, the color is blue, maybe it is the recipient's intention to represent the cold rain. Another example is to take photos of flames, ice lights, and other images with daylight-type colored negative films. After the films are printed, the colors are reddish, which is more helpful to the performance of the effect atmosphere. In this way, the use of color temperature changes, the intention to pursue a certain effect, of course, do not have to correct the color temperature.

12. Exposure rules

In general, it is concluded that when using a colored negative film for shooting, there should be no less exposure; when using a color reversed film, there should be no more exposure. The main reason is the range of the photosensitive width of the film.

Therefore, you must have a metering table when necessary.

Arc exposure method: first, take the value measured in the metering table, determine the exposure base and obtain a negative film, and then add and reduce the first shot, in this way, the selectivity of the three negatives is also high (of course, this is where conditions permit ).

Example: 1. F/8, 1/125, reduce Level 1: F/11, 1/125, or F/8, 1/250. Increase Level 1: F/5.6, 1/125, or F/8/60.

Nikon fm10 is a built-in TTF optical measurement. Therefore, when the contrast is high, when it is difficult to measure the light, we should grasp this rule: when most of the pictures are bright objects, the half-to-one aperture should be reduced. Most scenes are dark, and most of them should be open to a specific aperture. In this way, it is often possible to achieve satisfactory results.